• Cisco Compatible QSFP-H40G-CUxM-BCC 40G DAC Cable with Silver QSP-100G QSFP28 Module
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Blue Cable Co

QSFP-H40G-CUxM-BCC | Cisco Compatible QSFP to QSFP Copper DAC Cable, 40GB, 40GBASE-CR4 | 0.5 to 10M

QSFP-H40G-CU0-5M-BCC

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$75.90 inc. GST
$69.00 ex. GST
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Description

The QSFP-H40G-CUxM-BCC is a drop-in compatible replacement for the Cisco QSFP-H40G-CU series. This passive copper direct-attach cable provides plug-and-play 40 Gigabit connectivity between QSFP+ ports in Cisco switches and routers within racks and across adjacent racks. - IEEE 802.3ba 40GBASE-CR4 and QSFP+ MSA SFF-8436 compliance guarantee interoperability with all standards-compliant 40G QSFP+ equipment - QSFP+ to QSFP+ twinaxial copper assembly supporting 40 Gbps aggregate data rate across four 10G lanes - Passive design in lengths from 0.5 to 5 meters; active copper variants available in 7 and 10 meter lengths for extended reach - Hot-swappable 38-pin QSFP+ form factor with single 3.3V power supply and maximum 1.5W power consumption per end - Cost-effective alternative to optical transceivers and active optical cables for short-reach intra-rack and adjacent-rack connections - Operating temperature range 0 to 70 degrees C, RoHS compliant

Features

• IEEE 802.3ba 40GBASE-CR4 compliance ensures compatibility with any standards-compliant 40G QSFP+ port, including mixed-vendor environments where one end connects to Cisco and the other to third-party equipment
• Four independent 10 Gbps differential copper lanes bonded into a single twinaxial assembly, eliminating the need for four separate 10G links and reducing cable congestion in high-density racks
• Passive copper variants (0.5 to 5 meters) consume maximum 1.5W per end with zero active signal processing, delivering ultra-low latency and minimal heat generation compared to optical alternatives
• Active copper variants (7m, 10m) incorporate signal conditioning to extend reach beyond passive copper limits while maintaining lower power and cost profiles than optical transceivers and fiber
• Hot-swappable QSFP+ form factor with twinaxial shielding provides reliable 40 Gbps throughput in electrically noisy environments without service interruption during installation or replacement
• QSFP+ MSA SFF-8436 mechanical and electrical interface compliance guarantees physical fit and I2C communication with host systems for module detection and basic diagnostics

Warranty

5-Year Advanced Warranty on All Blue Cable Co® Products

Blue Cable Co® offers a comprehensive 5-Year Advanced Warranty on all our branded products. Our advanced warranty ensures fast, hassle-free replacements to keep your network running smoothly. If a fault occurs, we’ll deliver a replacement part before you return the faulty item—minimising downtime and giving you complete peace of mind.

Choose Blue Cable Co® for reliable, high-quality network components backed by industry-leading warranty support.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Compatible SFP Selector

Technical Specifications

Brand: Blue Cable Co
BCC SKU: QSFP-H40G-CUxM-BCC
Compatible Replacement For: QSFP-H40G-CU0-5M
Compatibility: Cisco compatible
Lab Testing: Tested in Sydney, Australia
Warranty: 5-year advanced hardware replacement (Blue Cable Co)
Form Factor: QSFP+ to QSFP+
Data Rate: 40 Gbps (4 x 10 Gbps lanes)
Cable Type: Passive twinaxial copper (0.5-5m), Active copper (7m, 10m)
Connector Type: QSFP+ 38-pin
Available Lengths: 0.5m, 1m, 2m, 3m, 4m, 5m, 7m, 10m
Standards: IEEE 802.3ba 40GBASE-CR4, QSFP+ MSA SFF-8436
Power Consumption: Maximum 1.5W per end (passive)
Operating Temperature: 0 to 70 degrees C
Storage Temperature: -40 to 85 degrees C

FAQs

Q: Will this work in place of the Cisco QSFP-H40G-CU0-5M?
A: Yes. This cable is a direct replacement for any Cisco QSFP-H40G-CU series part number. It complies with IEEE 802.3ba 40GBASE-CR4 and QSFP+ MSA SFF-8436, matching the same form factor, data rate, and electrical interface. It is plug-and-play compatible and requires no configuration.

Q: Which Cisco platforms support this cable?
A: This cable works in any Cisco switch or router with QSFP+ ports that support 40GBASE-CR4 direct-attach copper. This includes Nexus series switches and Catalyst platforms equipped with 40G QSFP+ uplink modules. Verify your platform documentation confirms 40GBASE-CR4 DAC support on the target ports.

Q: What is the difference between passive and active copper variants?
A: Passive variants (0.5 to 5 meters) rely solely on copper conductor quality and shielding for signal integrity, consuming minimal power and delivering the lowest latency. Active variants (7 and 10 meters) incorporate signal conditioning circuitry in each connector to regenerate the signal, extending reach at the cost of slightly higher power consumption and minimal added latency.

Q: Can I mix this cable with Cisco genuine DACs in the same switch?
A: Yes. Both cables comply with the same IEEE 802.3ba 40GBASE-CR4 and QSFP+ MSA SFF-8436 standards, so they are electrically and mechanically interchangeable. The host switch treats them identically. You can deploy this cable on any port where a Cisco QSFP-H40G-CU part would be used, including mixed deployments in the same chassis.

Q: Does this cable support 4x10G breakout mode?
A: No. This is a QSFP+ to QSFP+ cable designed for native 40G links between two QSFP+ ports. For 4x10G breakout connectivity from one QSFP+ port to four SFP+ ports, use a QSFP+ to 4xSFP+ breakout DAC cable instead. This cable aggregates four 10G lanes into a single 40G interface at each end.

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Fully tested. No brand-tax. Sydney re-coding available if required.

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100% compatible with equipment from major vendors

Coded and tested in our state of the art lab in Sydney

Cisco sfp-10g-sr transceiver module with metallic housing and a white label displaying serial number, model details, and regulatory markings.
Silver-colored sfp-10g-sr-bcc transceiver module with a white label featuring blue and black text, designed for 850nm wavelength optical communication.
Blue Cable Co
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Tested on real vendor hardware in Sydney

Every Blue Cable Co transceiver is coded for your platform and tested in our Sydney test rack on real vendor switches and firewalls before it ships. We check it is recognised and links up the same way the OEM optic does, so you don't find an "unsupported transceiver" error after it's installed.

Brands tested: Cisco, Meraki, Arista, Aruba, HPE, Juniper, Dell, Fortinet, Palo Alto, Check Point, Sophos, Moxa and NVIDIA. Speeds up to 100Gb.

  • 5 year replacement warranty
  • Sydney stock
  • Re-coding if you need it

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